Electric heater



April 21, 1925. 1,534,571

J. CONNING ELECTRIC HEATER Filed Oct. 1, 1924 Patented Apr. 21,, 1925.

v JAMES CQNNINTG, OF CHICAGO, ILLINOIS.

ELECTRIC nmrnn.

Application filed' October 1, 1924. Serial no. 740,9 5.

' To all whom it may coat-em:

; subject of the King of Be it known that I, JAMES CoNNrNo, a

Great Britain, residing at Chicago, in the county of Cook and State of Illinois, have'invented certain new and useful Improvements inlfilectric Heaters, of which the following is a specification. This invention relates, generally, to heaters,'but has particular relation to such devices in which electricity is employed to createheat, and if desired, to causeits circulation and distribution.

. One of the. objects of the invention is to provide a heater of the above named character which shall be simple and inexpensive in construction, portable in form, attractive in appearance, strong, durable and. efiicient inoperation.

Another object of the invention is the provision of a heater of such characteristics as V to furnish at the required time the desired amount of heat absolutely free from odor, dust, or other impurities, with practically no eflort-or labor, and which can be located or positioned at any desired place within a --room' without danger of injury to furniture or of igniting clothing,.draperies and the like.

Furthermore,-.the invention has for an ob-:

ject thereof the provision of an improved construction in heaters, whereby diffusion entirely automatic and vention will be disclosed in' the following.

of the heat generated thereby may be I without forced drafts, or if desired, by ,suchdrafts.

Other objects and advantages of the indescription and explanation.

The invention consists in certain peculiarities of the construction, novel arrangement will be hereinafter more fully set forth and and combination of the parts-thereof, as

specifically claimed.

i In the accompanying drawmgs,-

Fig. 1 is. a front perspective view ofa .spaced relation to the fer to like parts views of the drawing.

The reference .numeral 5 designates the casing of the heater, which casing is herein shown as being rectangularv in shape, but it is obvious that other formsthereof may be employed without a departure from the spirit of the invention. i a

The casing 5 may be made of any suitable material, but by preference of sheet metal and has located inits lower portion near its lower? edge, which edge is adapted to rest on the floor, a horizontally disposed bottom 6 or floor which closesthe lower portion of the casing,

of the casing is provided with an air inlet opening 7 r throughout the dilferent k Just above this floor 6 the face om which leads inwardly a-.

conduit or airpassage 8 as is clearly shown in 2 -and 3 of the drawing. This condult or air passage 8 communicates at its inner end with the lower portion f a vertically disposedauxiliary casing or air container 9 which is mounted on thefloor 6 in walls of the casing 5 and extends upwardly in the latter to a suit able point below the top of said casing.

As shown, the auxiliary casing or air con- ,tainer 9 is upwardly contracted abgut midway its length and has in its upper or neck portion 10 a block or piece of insulating material'll .on the upper surface of which is located or imbedded convolutions of an electric coil 12 or heat generating member of a well known kind. The resistance or electric coil 12 is connected by means of conductors 13 and 14 to a supply of electricity not shown, and said conductors are by prefer-- ence formed into a; single ,cable or cord 15 inthe ordinary manner which is extended through an opening in thelower portion of the casing 5 and then upwardly along the outer surface of the casing or member 9110" about its contracted portion and then ,through said portion and alongside the inner surface of the neck 10 of .the casi 9 and connected'at its upper end to the coil 12 in the usual or an well known way: The

insulation piece or b ock is provided with a central opening in which is located a tubular member \16' which extends centrally through and somewhat above the coil 12 from which it is insulated as shown in Fig.

2 of the drawing.

between the outer surface of the hood and Mounted within the upper portion of the casing is a dome-shaped hood 17 which may be made of any suitable non-inflammable or non-combustible material such as fire clay or.firebrick and concentrically surrounds the neck of the container 9 or air chamber. This hood is securely mounted within and connected to the walls and top of the. casing by means of bolts 18 and spacing blocks 19 of asbestos or the like, located the walls and top of the casing 5 so as to hold the hood 17 in spaced relation thereto as clearly shown in Figs. 2 3 of the drawing.

'whole by the numeral 25 and of any well known construction, which switch ,is herein shown as, being mounted on the lower por- .tion of the casing 5 but may be otherwise disposed and is employed for turning on and off the current to the heating coil 12. Likewise the conductors 23 and 24 are provided with a switch 26 similarly located to the switch 25 and employed for the purpose of controlling the electric current to the motor. I

The upper portion of each of the walls of the casing 5 is provided with a series of openings 27 arranged in a horizontally disposed row for the outlet or discharge of heated air and each of these rows of openin'gs is provided with a slidable damper plate 28 preferably located on thefinner sur-. faces of the walls of the casing 5 and. supported by means of a pair of brackets 29 and 30 located at the top and bottom of the rows of openin 27 and secured to the inner surface of e casing 5 in loose engagement with the (plates 28 so as to permit said plates" to be sli back and forth in order to regu late the quantity of hot air discharged through saidopenings or to shut ofi 'the same if desired Each of the'damper plates 28 is provided on its outer surface at about its niiddle with a knob 31 located in'a slot 32 in each of the walls of the 'casing 5 by which arrangement it is obvious the knobs.

31 can be reached when it is desired to move the plates in either direction.

From the foregoing and by reference to the drawing it will be readily understood and clearly seen that byturning on the current through the'conductors 13 and 14. and

that the air contained in the cavity Connected to the motor 20 and exswitch 25, the electric or resistance coil 12 will be caused to-become highly heated and of the dome hood 17 will thereby be heated and caused to pass from the hood and out of the casing in the direction indicated by the arrows in Fig.- 2 of the drawings. In this operation "it is manifest that a fresh supply of cold air will be caused toflow through the entrance opening 7, airpassage 8, the auxiliary casing 9, and the reduced tubular portion 16 into the cavity of the dome hood by reason of the expansion and discharge ffromsaid hood of the air previously contained therein-and that. thus a continuous but gentle circulation of air through the heater will be caused. If it is desired to more vigorously distribute the heated air, it is manifest that by opening the switch 26 in the circuit of the conductors 23 and 24,

the motor 20 and fan 22 will be set in op-.

eration, thus causing drafts of air to pass through the air passage 8, auxiliary casing 9, tube 16, into the dome and from thence downwardly and outwardly thereof, and then upwardly around the dome and out through the discharge openings 27Qin the upper portion of the casing 5 of the heater. It is evident that the operation of the heater may be automatically controlled by the employment of a thermostat connected to the switches 25 and 26, said thermostat being adapted, when a certain degree of temperature is reached, to automatically close said switches and when a certain de-' gree of reduction in the temperature is reached, to open the same. It is further manifest that a thermostat may be arranged and so associated with thedamper plates as to automatically open and close the same.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is: r

1. In a heater of the cfass described, the combination with a casing having means for the discharge of air in its upper portion and an inlet for airin its lower portion, a domeshaped hood mounted within the upper portion of the casing and spaced therefrom, an auxiliary casing mounted in the lower portion of the first named casing and having communication at its lower part with said air inlet and extended at its upper portion into the cavity of said dome, an electric or resistancecoil mounted on the upper portion of the auxiliary casing but insulated theretion of the casing and spaced therefrom, an from, a motor mountedin the lower portion auxiliary casing mounted in the lower porof the auxiliary, a fan in said casing driven 10 tion of the first named casing and having by said motor, electric conductors connecting communication at its lower part with said said coil to a supply of electricity, electric air inlet and extended at its upper portion conductors connecting the motor to a supply into the cavity of said dome, an electric or of electricity, and a switch in each of the cirresistance coil mounted on the upper (fortion cuits provided by said conductors. of the auxiliary casing but insulate there- JAMES OONNING.- 

